EWTN Catholic Q&A
The Tiara
Question from Linda Wilder on 04-24-2005:

Will Pope Benedict XVI utilize the Tiara during Inauguration Ceremonies on Sunday, 24 April 2005 and, if not, why not?

Answer by Colin B. Donovan, STL on 04-24-2005:

As it is on live now, the answer is apparently no.

The reason is probably to avoid the trappings of monarchy, with which many people today cannot identify. The Church must be all things to all men, so Catholics should not get "hung up" on such symbols. If monarchy makes a come-back, probably the tiara will, as well.